W3F1-2021-0036, (Waterford 3) - Annual Radiological Environmental Operating Report 2020

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(Waterford 3) - Annual Radiological Environmental Operating Report 2020
ML21119A357
Person / Time
Site: Waterford Entergy icon.png
Issue date: 04/29/2021
From: Wood P
Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
W3F1-2021-0036
Download: ML21119A357 (53)
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Text

Entergy Operations, Inc.

17265 River Road Killona, LA 70057-3093 Tel 504 464 3786 Paul Wood Manager - Regulatory Assurance Waterford 3 W3F1-2021-0036 April 29, 2021 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Annual Radiological Environmental Operating Report -2020 Waterford Steam Electric Station, Unit 3 (Waterford 3)

Docket No. 50-382 Renewed Facility Operating License No. NPF-38 Attached is the Annual Radiological Environmental Operating Report for the period of January 1 through December 31, 2020. This report is submitted pursuant to the Requirements of Waterford 3 Technical Specification Section 6.9.1.7.

This report contains no new commitments. Please contact Paul Wood, Regulatory Assurance Manager, at (504) 464-3786 if you have questions regarding this information.

Respectfully, Digitally signed by Paul Wood Paul Wood Date: 2021.04.29 14:25:13 -05'00' PW/llb

Attachment:

Annual Radiological Environmental Operating Report - 2020 cc: NRC Region IV Regional Administrator NRC Senior Resident Inspector - Waterford Steam Electric Station Unit NRC Project Manager Entergy Legal, General Sr Councel

Attachment to W3F1-2021-0036 Annual Radiological Environmental Operating Report - 2020 (51 pages)

2020 Annual Radiological Environmental Operating Report Waterford 3 Document Number: 50-382 Date: f- l~-:2/

Bo Boudreaux Chemistry Technician

~

Reviewer: _ __ _ _ _ _ /~------- Date:

Thomas House Chemistry Supervisor Reviewer: Date: l/ /! 'l/2-/

- - - -Mich e II e Beavers Effluent Specialist o eois Chemistry Manager Date ~fa/

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Page 1 of 50 Plant: Waterford 3 YEAR: 2020 Docket Number: 50-382 Annual Radiological Environmental Operating Report

Plant: Waterford 3 I Year: 2020 I Page 2 of 50 Annual Radiological Environmental Operating Report TABLE OF CONTENTS 1.0 EXECUTIVE

SUMMARY

.............................................................................................................5 1.1 Radiological Environmental Monitoring Program ...................................................................5 1.2 Reporting Levels ...................................................................................................................5 1.3 Comparison to State Program ...............................................................................................6 1.4 Sample Deviations ................................................................................................................6 1.5 Program Modifications...........................................................................................................6

2.0 INTRODUCTION

........................................................................................................................6 2.1 Radiological Environmental Monitoring Program ...................................................................6 2.2 Pathways Monitored ..............................................................................................................7 2.3 Land Use Census..................................................................................................................7 3.0 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM REQUIREMENTS ......................8 4.0 INTERPRETATION AND TRENDS OF RESULTS ....................................................................19 4.1 Air Particulate and Radioiodine Sample Results..................................................................19 4.2 Thermoluminescent Dosimetry (TLD) Sample Results ........................................................20 4.3 Waterborne Sample Results................................................................................................21 4.3.1 Surface Water Results ............................................................................................................... 21 4.3.2 Drinking/Surface Water Results ................................................................................................. 21 4.3.3 Sediment Sample Results .......................................................................................................... 22 4.4 Ingestion Sample Results ....................................................................................................22 4.4.1 Fish Sample Results ................................................................................................................... 22 4.4.2 Broad Leaf Vegatation Sample Results ...................................................................................... 22 4.4.3 Milk Sample Results .................................................................................................................... 22 4.5 Land Use Census Results ...................................................................................................23 4.6 Interlaboratory Comparison Results ....................................................................................25 5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

..........................25

Plant: Waterford 3 I Year: 2020 I Page 3 of 50 Annual Radiological Environmental Operating Report ATTACHMENTS - Sample Deviations ........................................................................................................30 - Monitoring Results Tables ............................................................................................31 - Interlaboratory Comparison Program Results ...............................................................45 TABLES Table 1: Exposure Pathway - Airborne ........................................................................................8 Table 2: Exposure Pathway - Direct Radiation ............................................................................9 Table 3: Exposure Pathway - Waterborne .................................................................................13 Table 4: Exposure Pathway - Ingestion .....................................................................................14 Table 5: Land Use Census - 2020 Land Use Census Results ...................................................24 Table 6: Radiological Environmental Monitoring Program Summary .........................................26 Table 7: Sample Deviations Table.............................................................................................30 Table 8: Air Particulate Data Table............................................................................................31 Table 9: Radioiodine Cartridge Data Table ...............................................................................32 Table 10: Air Particulate Composite Data Table ........................................................................33 Table 11: Thermoluminescent Dosimeters - Inner Ring .............................................................34 Table 12: Thermoluminescent Dosimeters - Outer Ring ............................................................34 Table 13: Thermoluminescent Dosimeters - Special Interest Areas ..........................................35 Table 14: Thermoluminescent Dosimeters - Control..................................................................35 Table 15: Surface Water - Gamma............................................................................................36 Table 16: Surface Water - Tritium .............................................................................................37 Table 17: Drinking/Surface Water - Gamma and Gross Beta ....................................................38 Table 18: Drinking/Surface Water - Iodine-131..........................................................................39 Table 19: Drinking/Surface Water - Tritium ................................................................................40 Table 20: Sediment - Gamma ...................................................................................................41 Table 21: Fish - Gamma............................................................................................................42

Plant: Waterford 3 I Year: 2020 I Page 4 of 50 Annual Radiological Environmental Operating Report TABLES Cont'd Table 22: Broad Leaf Vegatation - Gamma ...............................................................................43 Table 23: Milk - Gamma and Iodine-131 ...................................................................................44 Table 24: Analytics Environmental Radioactivity Cross Check Program....................................47 Table 25: DOE's Mixed Analyte Performance Evaluation Program (MAPEP) ............................49 Table 26: ERA Environmental Radioactivity Cross Check Program ..........................................50 FIGURES Figure 1: Exposure Pathway .....................................................................................................15 Figure 2: REMP Samples Within 2 Miles of Waterford 3............................................................16 Figure 3: REMP Samples Within 2 to 10 Miles of Waterford 3...................................................17 Figure 4: REMP Samples Within 10 to 50 Miles of Waterford 3 .................................................18 Figure 5: TLD Radiation Dose Comparison By Year .................................................................20

Plant: Waterford 3 I Year: 2020 I Page 5 of 50 Annual Radiological Environmental Operating Report 1.0 EXECUTIVE

SUMMARY

1.1 Radiological Environmental Monitoring Program The Annual Radiological Environmental Operating Report presents data obtained through analyses of environmental samples collected for Waterford 3 Radiological Environmental Monitoring Program (REMP) for the period January 1 through December 31, 2020. This report fulfills the requirements of Waterford 3 Technical Specification 6.9.1.7.

All required lower limit of detection (LLD) capabilities were achieved in all sample analyses during 2020, as required by Waterford 3s Technical Requirements Manual (TRM) Table 4.12-1. No measurable levels of radiation above baseline levels attributable to Waterford 3's operation were detected in the vicinity of Waterford 3.

The 2020 Radiological Environmental Monitoring Program thus substantiated the adequacy of source control and effluent monitoring at Waterford 3 with no observed impact of plant operations on the environment.

Waterford 3 established the REMP prior to the station becoming operational in 1985 to provide data on background radiation and radioactivity normally present in the area. Waterford 3 has continued to monitor the environment by sampling air, water, sediment, fish and broad leaf, as well as measuring direct radiation. Waterford 3 also samples milk if milk-producing animals used for human consumption are present within five miles (8 km) of the plant.

The REMP includes sampling indicator and control locations within an approximate 31-mile radius of the plant. The REMP utilizes indicator locations near the site to show any increases or buildup of radioactivity that might occur due to station operation and control locations farther away from the site to indicate the presence of only naturally occurring radioactivity. Waterford 3 personnel compare indicator results with control and preoperational results to assess any impact Waterford 3 operation might have had on the surrounding environment.

In 2020, environmental samples were collected for radiological analysis. The results of indicator locations were compared with control locations and previous studies. It was concluded that no significant relationship exists between Waterford 3 operation and effect on the area around the plant. The review of 2020 data showed radioactivity levels in the environment were undetectable in many locations and near background levels in significant pathways.

1.2 Reporting Levels Waterford 3's review indicates that no samples equaled or exceeded reporting levels for radioactivity concentration in environmental samples, as outlined in Technical Requirements Manual (TRM) Table 3.12-2 when averaged over any calendar quarter, due to Waterford 3 effluents. Therefore, 2020 results did not trigger any radiological monitoring program special reports.

Plant: Waterford 3 I Year: 2020 I Page 6 of 50 Annual Radiological Environmental Operating Report 1.3 Comparison to State Program Waterford 3 personnel compared REMP data to state monitoring programs as results became available. Historically, the programs used for comparison have included the U.S. Nuclear Regulatory Commission (NRC) Thermoluminescent Dosimeter (TLD)

Direct Radiation Monitoring Network and the Environmental Radiological Laboratory -

Department of Environmental Quality Laboratory Services Division (ERL-DEQLSD).

The NRC TLD Network Program was discontinued in 1998. Historically these results have compared to those from the Waterford 3 REMP. Waterford 3s TLD results continue to remain similar to the historical average and continue to verify that plant operation is not affecting the ambient radiation levels in the environment.

The ERL-DEQLSD and the Waterford 3 REMP entail similar radiological environmental monitoring program requirements. These programs include collecting air samples and splitting or sharing sample media such as water, sediment and fish.

Both programs have obtained similar results over previous years.

1.4 Sample Deviations During 2020, environmental sampling was performed for eight media types addressed in the ODCM and for direct radiation. A total of 467 samples of the 468 scheduled were obtained. Of the scheduled samples, 99.8% were collected and analyzed in accordance with the requirements specified in the ODCM. Attachment 1 contains the listing of sample deviations and actions taken.

1.5 Program Modifications There were no program modifications during the reporting period.

2.0 INTRODUCTION

2.1 Radiological Environmental Monitoring Program Waterford 3 established the REMP to ensure that plant operating controls properly function to minimize any associated radiation endangerment to human health or the environment. The REMP is designed for:

Analyzing applicable pathways for anticipated types and quantities of radionuclides released into the environment.

  • Considering the possibility of a buildup of long-lived radionuclides in the environment and identifying physical and biological accumulations that may contribute to human exposures.
  • Considering the potential radiation exposure to plant and animal life in the environment surrounding Waterford 3.
  • Correlating levels of radiation and radioactivity in the environment with radioactive releases from station operation.

Plant: Waterford 3 I Year: 2020 I Page 7 of 50 Annual Radiological Environmental Operating Report 2.2 Pathways Monitored The airborne, direct radiation, waterborne and ingestion pathways are monitored as required by Waterford 3 TRM Table 3.12-1. A description of the REMP utilized to monitor the exposure pathways is described in the attached Tables and Figures.

Section 4.0 of this report provides a discussion of 2020 sampling results with Section 5.0 providing a summary of results for the monitored exposure pathways.

2.3 Land Use Census Waterford 3 conducts a land use census biennially, as required by Section 3.12.2 of the TRM. The purpose of this census is to identify changes in uses of land within five miles of Waterford 3 that would require modifications to the REMP and the Offsite Dose Calculation Manual (ODCM/TRM). The most important criteria during this census are to determine the location in each sector of the nearest:

1) Residence
2) Animal milked for human consumption
3) Garden of greater than 50 m2 (500 ft2) producing broad leaf vegetation.

Waterford 3 conducts the land use census by:

  • Field surveys in each meteorological sector out to five miles in order to confirm:

Nearest permanent residence Nearest garden > 50 square meters Nearest beef cow Nearest food product Nearest milking animal

  • Identifying locations on maps, measuring distances to Waterford 3 and recording results on data sheets.
  • Comparing current census results to previous results.

Plant: Waterford 3 I Year: 2020 I Page 8 of 50 Annual Radiological Environmental Operating Report 3.0 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM REQUIREMENTS Table 1: Exposure Pathway - Airborne Sample Point Description Sampling and Collection Requirement Type and Frequency Of Analyses Distance and Direction Frequency RADIOIODINE AND PARTICULATES

  • APQ-1 (NW, 0.81 Miles) -

(West bank) Located in Three samples from close to the three SITE Continuous sampler operation

  • Radioiodine Canisters - I-131 analysis biweekly.

soybean/sugarcane field off LA BOUNDARY locations, in different sectors, in with sample collection biweekly, 18 east of LA 18/3141

  • Air Particulate - Gross beta radioactivity analysis or near sectors having the highest calculated or more frequently if required by intersection. following filter change. Gamma isotopic analysis of annual average ground-level D/Q. dust loading.
  • APF-1 (ESE, 0.35 Miles) - composite (by location) quarterly.

(West bank) Located on north side of Secondary Meteorological Tower.

  • APC-1 (NE, 0.67 Miles) - (East bank) Located inside Little Gypsy Cooling Water Intake Structure fence.

RADIOIODINE AND PARTICULATES

  • APP-1 (WNW, 0.84 Miles) - Continuous sampler operation
  • Radioiodine Canisters - I-131 analysis biweekly.

(West bank) Located in with sample collection biweekly, One sample from the vicinity of a community or more frequently if required by

  • Air Particulate - Gross beta radioactivity analysis soybean/sugarcane field on having the highest calculated annual average dust loading. following filter change. Gamma isotopic analysis of Short St. in Killona.

ground level D/Q. composite quarterly.

RADIOIODINE AND PARTICULATES

  • APE-26 (E, 25.8 Miles) - (West Continuous sampler operation
  • Radioiodine Canisters - I-131 analysis biweekly.

bank) Located at Entergy office with sample collection biweekly, One sample from a control location, as for or more frequently if required by

  • Air Particulate - Gross beta radioactivity analysis on Virgil Street in Gretna.

example 15 - 30 km distance and in the least dust loading. following filter change. Gamma isotopic analysis of (Control) prevalent wind direction. composite quarterly.

Plant: Waterford 3 I Year: 2020 I Page 9 of 50 Annual Radiological Environmental Operating Report Table 2: Exposure Pathway - Direct Radiation Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency TLDS

  • A-2 (N, 1.27 Miles) - (East bank)

Located on pole on LA 628 at Zephrin An inner ring of stations, one in each Quarterly

  • Gamma dose quarterly.

L. Perriloux Fire House.

meteorological sector in the general area of the SITE BOUNDARY.

  • B-1 (NNE, 0.75 Miles) - (East bank)

Located on fence west of Little Gypsy.

  • C-1 (NE, 0.67 Miles) - (East bank)

Located on fence at Little Gypsy Cooling Water Intake structure.

  • D-2 (ENE, 1.24 Miles) - (East bank)

Located on pole on levee at west entrance to Bonnet Carre Spillway

  • E-1 (E, 0.41 Miles) - (West bank)

Located on pole on LA 18 east of Waterford 3 plant entrance.

  • F-2 (ESE, 1.15 Miles) - (West bank)

Located on fence on LA 3142 south of LA 18.

  • G-2 (SE, 1.26 Miles) - (West bank)

Located on fence on LA 3142 north of railroad overpass.

  • H-2 (SSE, 1.54 Miles) - (West bank)

Located on fence on LA 3142 north of LA 3127/3142 intersection.

Plant: Waterford 3 I Year: 2020 I Page 10 of 50 Annual Radiological Environmental Operating Report Table 2: Exposure Pathway - Direct Radiation Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency TLDS

  • J-2 (S, 1.38 Miles) - (West bank)

Located on fence south of LA 3127 An inner ring of stations, one in each Quarterly

  • Gamma dose quarterly.

west of LA 3127/3142 intersection.

meteorological sector in the general area of the SITE BOUNDARY.

  • K-1 (SSW, 1.06 Miles) - (West bank)

Located on stop sign at entrance to Entergy Education Center on LA 3127.

  • L-1 (SW, 1.06 Miles) - (West bank)

Located on gate on LA 3127 west of LA 3127/3142 intersection.

  • M-1 (WSW, 0.76 Miles) - (West bank)

Located on south gate of Waterford 1 and 2.

  • N-1 (W, 0.98 Miles) - (West bank)

Located on pole at corner of Railroad Avenue and School House Road.

  • P-1 (WNW, 0.84 Miles) - (West bank)

Located on fence enclosing air sample station APP-1.

  • Q-1 (NW, 0.81 Miles) - (West bank)

Located on fence enclosing air sample station APQ-1.

  • R-1 (NNW, 0.51 Miles) - (West bank)

Located at Waterford 1 and 2 Cooling Water Intake Structure.

Plant: Waterford 3 I Year: 2020 I Page 11 of 50 Annual Radiological Environmental Operating Report Table 2: Exposure Pathway - Direct Radiation Sample Point Description Sampling and Requirement Type and Frequency Of Analyses Distance and Direction Collection Frequency TLDS

  • A-5 (N, 4.59 Miles) - (East bank)

Located on pole at intersection of An outer ring of stations, one in ten of the Quarterly

  • Gamma dose quarterly.

Oswald Avenue and US 61.

meteorological sectors in the 6 to 8 km ranges from the site.

  • B-4 (NNE, 3.75 Miles) - (East bank)

Located on pole near weigh station on US 61.

  • D-5 (ENE, 4.09 Miles) - (East bank)

Located on gate on shell road north of US 61/LA 48 intersection.

  • E-5 (E, 4.08 Miles) - (East bank)

Located on fence on Wesco Street off LA 48.

  • F-4 (ESE, 3.53 Miles) - (West bank)

Located on pole behind house at 646 Aquarius St. in Hahnville.

  • G-4 (SE, 3.30 Miles) - (West bank)

Located on pole on LA 3160 north of railroad track.

  • H-8 (SSE, 8.13 Miles) - (West bank)

Located on pole in front of Hahnville High School.

  • P-6 (WNW, 5.58 Miles) - (West bank) Located on fence at LA 640/railroad track intersection.
  • Q-5 (NW, 5.01 Miles) - (West bank)

Located on pole on LA 18 across from Mississippi River marker 137.

  • R-6 (NNW, 5.52 Miles) - (East bank)

Located on fence on LA 3223 near railroad crossing.

Plant: Waterford 3 I Year: 2020 I Page 12 of 50 Annual Radiological Environmental Operating Report Table 2: Exposure Pathway - Direct Radiation Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency TLDS

  • E-15 (E, 11.7 Miles) - (East bank)

Located on fence on Alliance The balance of the stations (five) to be placed Quarterly

  • Gamma dose quarterly.

Avenue.

in special interest areas such as population centers, nearby residences, schools, and in

  • F-9 (ESE, 8.18 Miles) - (East bank) one or two areas to serve as control locations. Located on fence north of railroad tracks on Jonathan Street.
  • G-8 (SE, 7.74 Miles) - (West bank)

Located on back fence of Luling Entergy Office.

  • J-15 (S, 11.7 Miles) - (West bank)

Located on pole near LA 631/Hwy 90 intersection in Des Allemands.

  • E-26 (E, 25.8 Miles) - (West bank)

Located at Entergy office on Virgil Street in Gretna. (Control)

Plant: Waterford 3 I Year: 2020 I Page 13 of 50 Annual Radiological Environmental Operating Report Table 3: Exposure Pathway - Waterborne Sample Point Description Distance Sampling and Requirement Type and Frequency Of Analyses and Direction Collection Frequency

  • SWP-7 (WNW, 7.37 Miles) - (West bank) Located at St. John Parish Composite sample over
  • Gamma isotopic analysis and tritium analysis Waterworks in Edgard. (Control) one quarter period. quarterly.
  • SWF-2 (ESE, 1.51 Miles) - (West SURFACE WATER bank) Located at Dow Chemical Plant One sample upstream and one sample drinking water canal.

downstream.

  • SWE-5 (E, 4.59 Miles) - (East bank)

Located at St. Charles Parish Waterworks in New Sarpy.

  • SWK-1 (SSW, 0.49 Miles) - (West bank) Located at 40 Arpent Canal south of the plant.

DRINKING WATER

  • DWP-7 (WNW, 7.37 Miles) - (West bank) Located at St. John Parish One sample upstream and one sample Composite sample over
  • I-131 analysis on each composite when the dose Waterworks in Edgard. (Control) downstream. one month period when I- calculated for the consumption of the water is
  • DWF-2 (ESE, 1.51 Miles) - (West 131 analysis is performed, greater than one mrem per year. Composite for bank) Located at Dow Chemical Plant quarterly composite gross beta and gamma isotopic analyses quarterly.

drinking water canal. otherwise. Composite for tritium analysis quarterly.

  • DWE-5 (E, 4.59 Miles) - (East bank)

Located at St. Charles Parish Waterworks in New Sarpy.

SEDIMENT FROM SHORELINE

  • SHWQ-6 (NW, 5.99 Miles) - (East bank) Located on LA 628 east of One sample upstream and one sample Annually
  • Gamma isotopic analysis annually.

Reserve ferry landing. (Control) downstream.

  • SHWE-3 (E, 2.99 Miles) - (West bank) Located at Foot Ferry landing on LA 18.
  • SHWK-1 (SSW, 0.49 Miles) - (West bank) Located at 40 Arpent Canal south of plant.

Plant: Waterford 3 I Year: 2020 I Page 14 of 50 Annual Radiological Environmental Operating Report Table 4: Exposure Pathway - Ingestion Sample Point Description Distance Sampling and Collection Requirement Type and Frequency Of Analyses and Direction Frequency MILK

  • Samples from milking animals in the three
  • MKE-3 (E, 2.35 Miles) - (West bank) Quarterly
  • Gamma isotopic and I-131 analysis quarterly.

locations within 5 km distance having the Located at the Zeringues house on LA highest dose potential. If there are none, 18 in Taft.

then, one sample from milking animals in each of the three areas between 5 to 8

  • MKA-31 (N, 31.2 Miles) - (East bank) km distant where doses are calculated to Located at 18736 Sisters Road, be greater than 1 mrem per year. Ponchatoula, LA. (Control)
  • One sample from milking animals at a control location 15 - 30 km distant and in the least prevalent wind direction.

FISH AND INVERTEBRATES

  • FH-2 (Distance/Direction Not Applicable) - Downstream of the plant
  • One sample of each commercially and/or Sample in season, or
  • Gamma isotopic analysis on edible portions discharge structure.

recreationally important species in vicinity annually if they are not annually.

of plant discharge area.

  • FH-3 (Distance/Direction Not seasonal.

Applicable) - (Westbank) Waterways

  • One sample of same species in area not downstream of plant discharge directed influenced by plant discharge. to 40 Arpent Canal.
  • FH-1 (Distance/Direction Not Applicable) - Upstream of the plant intake structure. (Control)

BROAD LEAF VEGATATION

  • BLQ-1 (NW, 0.83 Miles) - (West bank)

Located near air sample station.

  • Samples of one to three different types of Quarterly during the growing
  • Gamma isotopic and I-131 analysis quarterly.

broadleaf vegetation grown nearest each

  • BLB-1 (NNE, 0.81 Miles) - (East bank) season.

of the two different off-site locations of Located west of Little Gypsy on LA 628 highest predicted annual average ground level D/Q if milk sampling is not

  • BLE-20 (E, 19.7 Miles) - (West bank) performed. Located on property of Nine Mile Point in Westwego. (Control)
  • One sample of each of the similar broadleaf vegetation grown 15 - 30 km distant in the least prevalent wind direction if milk sampling is not performed.

Plant: Waterford 3 I Year: 2020 I Page 15 of 50 Annual Radiological Environmental Operating Report Figure 1: Exposure Pathway NUCLEARPQW -RPLAN

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'LIOUIO EFFLUENT I *** *

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,~~5\\ 0 Ex.posure pathways to man

Plant: Waterford 3 Year: 2020 Page 16 of 50 Annual Radiological Environmental Operating Report Figure 2: REMP Samples Within 2 Miles of Waterford 3 REMP Samples Within A ). N ~

2 Miles of Waterford-3 R FH-1 B

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Sample Types r~ ... REMP Airborne DWF-2 Broad Leaf C§l SWF-2 F

  • Milk WF- 3 V *... Sanit ary Systern TLD

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I iii AirbornefTLD "7c,~

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+ Fish G

~ Shoreline Sediment Drinking Water

@ Surface Wat er J

0 0.5 1 Miles

Plant: Waterford 3 Year: 2020 Page 17 of 50 Annual Radiological Environmental Operating Report Figure 3: REMP Samples within 2 to 10 Miles of Waterford 3 REMP Samples Within A N 2 to 10 Miles of Waterford-3 A

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REMP M

  • Airborne Broa d Leaf

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TLD Airbaorne /T LO

+ Fish ar urche Shoreli ne S edi m ent

  • Orin k i ng W a ter 2 41M iles J
  • S u rfac e W ater

Plant: Waterford 3 I Year: 2020 I Page 18 of 50 Annual Radiological Environmental Operating Report Figure 4: REMP Samples within 10 to 50 Miles of Waterford 3 N

  • Sho r elin e S e d iment Drinking Water 10 o 10

~""'liiiiiii~~~~~~~20 Miles

  • SUrf ace Water

Plant: Waterford 3 I Year: 2020 I Page 19 of 50 Annual Radiological Environmental Operating Report 4.0 INTERPRETATION AND TRENDS OF RESULTS 4.1 Air Particulate and Radioiodine Sample Results Samples of airborne particulate and radioiodine were collected at four indicator locations and one control location and analyzed for gross beta radionuclides, Iodine-131 and gamma radionuclides (quarterly air particulate filter composites only).

Waterford 3 did not detect any gamma radionuclides in the quarterly air particulate composites or Iodine-131 in the radioiodine cartridges during the reporting period as has been the case in previous years. Indicator gross beta air particulate results for 2020 were similar to background levels obtained during previous years of the operational REMP and well below preoperational levels as seen below. Results are reported as annual average pCi/m3.

Monitoring Period Result 2010 - 2019 (Minimum Value) 0.017 2020 Average Value 0.017 2010 - 2019 (Maximum Value) 0.026 Preoperational 0.080 In the absence of plant-related gamma radionuclides, gross beta activity is attributed to naturally occurring radionuclides. Table 6, which includes gross beta concentrations and provides a comparison of the indicator and control means and ranges, emphasizes the consistent trends seen in this pathway to support the presence of naturally occurring activity. Therefore, it can be concluded that the airborne pathway continues to be unaffected by Waterford 3 operations.

Plant: Waterford 3 I Year: 2020 I Page 20 of 50 Annual Radiological Environmental Operating Report 4.2 Thermoluminescent Dosimetry (TLD) Sample Results Waterford 3 reports measured dose as net exposure (field reading less transit reading) normalized to 92 days and relies on comparison of the thirty indicator locations to the one control as a measure of plant impact. Waterford 3s comparison of the inner ring, outer ring, and special interest area TLD results to the control, as seen in Table 6, identified no noticeable trend that would indicate that the ambient radiation levels are being affected by plant operations. In addition, the indicator value of 11.4 millirem (mrem) shown in the TLD radiation dose comparison graph below shows the 2020 concentration is comparable to historic results. Overall, Waterford 3 concluded that the ambient radiation levels are not being affected by plant operations.

The average exposure rates during 2020 are consistent with those from the preoperational program and the previous five years of operation. In particular, the preoperational survey indicates that exposure rates ranged between 11 and 33 mrem/standard quarter with an average of 20 mrem/standard quarter. The range during the previous five years of operation was 9 to 15 mrem/standard quarter with an average exposure rate of 12 mrem/standard quarter.

A comparison of the indicator results to the control results, as seen in Table 6, shows that the average indicator locations are slightly higher than that of the control. As shown in Attachment 2, Tables 11-14, several indicator locations are higher than the control by a few mrem with a maximum difference of six mrem. The differences between indicator locations and the control, and TLD stations grouped by distance from the plant are expected due to a variety of factors not related to Waterford 3 plant operations that can affect background radiation in the vicinity of each TLD station.

Figure 5 TLD Radiation Dose Comparison By Year 40 ~ - ------------------------------------------------ ~ 40 35 35 c:::::::::J Control

- Indicator 30 --+- Upper Range 30

- - Lower Range t'.

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YEAR

Plant: Waterford 3 I Year: 2020 I Page 21 of 50 Annual Radiological Environmental Operating Report 4.3 Waterborne Sample Results Analytical results for 2020 drinking water/surface water samples were similar to those reported in previous years. Gamma radionuclides, iodine-131 and tritium analytical results for 2020 waterborne samples were below the ODCM-required LLD similar to those reported in previous years. Gross Beta continues to be detected in Waterford 3 drinking water samples consistent with historical results. These results are further explained below.

4.3.1 Surface Water Results Samples were collected from one indicator location and analyzed for gamma radionuclides and tritium. Gamma radionuclides were below detectable limits which is consistent with results seen in previous operational years. Tritium was not detected in any of the quarterly samples. Therefore, the operation of Waterford 3 had no definable impact on this waterborne pathway in 2020.

4.3.2 Drinking/Surface Water Results Drinking water samples also serve as surface water samples for Waterford 3.

Therefore, monthly and quarterly gamma spectroscopy and tritium analyses of drinking water also satisfy the surface water sampling requirement.

Samples were collected from two indicators and one control location.

Drinking/Surface water samples were analyzed for, gamma radionuclides, gross beta, iodine-131, and tritium. Gamma radionuclides, iodine-131, and tritium concentrations were below the LLD limits at the indicator and control locations. Gross beta was detected in both indicator and control locations. The average concentration of the indicator locations is comparable to the 2009 - 2019 operational years and below background preoperational data as shown below. Gross beta results from 2020 are summarized in Table 6. Results are reported as annual average pCi/L.

Monitoring Period Result 2010 - 2019 (Minimum Value) 3.5 2020 Average Value 3.8 2010 - 2019 (Maximum Value) 6.6 Preoperational 7.0 Table 17, which includes gross beta concentrations for 2020, provides a comparison of the indicator and control means. It shows that the waterborne pathway continues to remain at background levels. Waterford 3 personnel have noted no definable trends associated with drinking water results at the indicator location. Therefore, the operation of Waterford 3 had no definable impact on this waterborne pathway in 2020 and levels of radionuclides remain similar to those obtained in previous operational years.

Plant: Waterford 3 I Year: 2020 I Page 22 of 50 Annual Radiological Environmental Operating Report 4.3.3 Sediment Sample Results Sediment samples were collected from two indicators and one control location in 2020 and analyzed for gamma radionuclides. Gamma radionuclides were below the LLD limits at both indicator and control locations. Listed below is a comparison of 2020 Cs-137 indicator results to the 2010-2019 operational years. Waterford 3 operations had no significant impact on the environment or public by this waterborne pathway.

Monitoring Period Result 2010-2019 (Minimum Value) <LLD 2020 Value <LLD 2010-2019 (Maximum Value) <LLD 4.4 Ingestion Sample Results 4.4.1 Fish Sample Results Fish samples were collected from two indicator and one control location and analyzed for gamma radionuclides. In 2020, gamma radionuclides were below detectable limits which are consistent with the preoperational monitoring period and operational results. Therefore, based on these measurements, Waterford 3 operations had no significant radiological impact upon the environment or public by this ingestion pathway.

4.4.2 Broad Leaf Vegetation Sample Results The REMP has detected radionuclides prior to 1990 that are attributable to other sources. These include the radioactive plume release due to reactor core degradation at Chernobyl Nuclear Power Plant in 1986 and atmospheric weapons testing.

In 2020, broad leaf vegetation samples were collected from two indicator and one control location and analyzed for iodine-131 and gamma radionuclides. The 2020 levels remained undetectable, as has been the case in recent years. Therefore, based on these measurements, Waterford 3 operations had no significant radiological impact upon the environment or public by this ingestion pathway.

4.4.3 Milk Sample Results Milk samples from the indicator location were unavailable for collection during 2020; therefore, broad leaf vegetation sampling was performed as required by TRM 3.12-1.

Results are shown in section 4.4.2. Milk samples were collected from one control location and analyzed for iodine-131 and gamma radionuclides. Cesium-137 was not measured in any control samples in 2020. Therefore, Waterford 3 concluded that plant operations had no significant impact on this pathway in 2020.

Plant: Waterford 3 I Year: 2020 I Page 23 of 50 Annual Radiological Environmental Operating Report 4.5 Land Use Census Results The latest land use census was conducted September 3 - September 7, 2020. The nearest residence, garden, beef cow, food product and milk animal in each sector within a five mile radius of the plant was located by visual inspection and verbal inquiry.

The land use census identified several changes in 2020. These changes include three nearest residence changes, 5 nearest garden changes, 1 milk animal change, and 1 meat animal change.

The three nearest residence changes identified were in sectors A, N, and P. The nearest residence in sector A has changed to 106 Evangeline Road at a distance of 1.24 miles from the plant. The nearest residence in sector N has changed to 262 School House Road at a distance of 0.94 miles from the plant. The nearest residence in sector P has changed to 100 School House Road at a distance of 0.86 miles from the plant.

The five nearest garden changes identified were in sectors A, B, G, P, and Q. The nearest garden in sector A has changed to 17834 River Road at a distance of 1.31 miles from the plant. The nearest garden in sector B has changed to 199 Evangeline Street at a distance of 1.40 miles from the plant. The nearest garden in sector G has changed to 694 Courthouse Lane at a distance of 4.01 miles from the plant. The nearest garden in sector P has changed to 244 School House Road at a distance of 0.92 miles from the plant. The nearest garden in sector Q has changed to 126 Post Street at a distance of 0.93 miles from the plant.

The one nearest milk animal change identified was in sector E. The nearest milk animal location in sector E no longer has any milk animals. Therefore, there are no identified nearest milk animal locations in 2020.

The one nearest meat animal location change identified was in sector A. The nearest meat animal in sector A has changed to 614 HWY 628 in LaPlace at a distance of 3.56 miles from the plant.

Based upon the locations identified in this survey, the locations identified in previous surveys and the locations currently being used to calculate dose commitments from liquid and gaseous effluents released from Waterford 3, no REMP sampling location changes are necessary. Results of the 2020 biennial census are shown in Table 5.

Plant: Waterford 3 I Year: 2020 I Page 24 of 50 Annual Radiological Environmental Operating Report Table 5: 2020 Land Use Census Results Nearest Nearest Nearest Nearest Nearest Food Nearest Sector Direction Residence Garden Milk Cow Beef Cow Products Goat (miles)

(miles) (miles) (miles) (miles) (miles)

A N 1.2 1.3 ^ 3.6 *3.8 1.3 B NNE 1.0 1.4 ^ 1.9 ^ 1.4 C NE 0.9 1.1 ^ ^ ^ 1.1 D ENE 0.9 0.9 ^ ^ ^ 0.9 E E 2.3 2.3 ^ 2.3 ^ 2.3 F ESE 3.2 2.3 ^ 2.3 ^ 2.3 G SE 4.0 4.0 ^ 2.5 ^ 4.0 H SSE ^ ^ ^ ^ ^ ^

J S ^ ^ ^ ^ ^ ^

K SSW ^ ^ ^ ^ ^ ^

L SW ^ ^ ^ ^ ^ ^

M WSW ^ ^ ^ ^ ^ ^

N W 0.9 1.2 ^ ^ ^ 1.2 P WNW 0.9 0.9 ^ ^ ^ 0.9 Q NW 0.9 0.9 ^ ^ ^ 0.9 R NNW 3.1 3.4 ^ 5.0 ^ 3.4 Symbol Comment

^ Nothing was located within a five-mile radius of Waterford 3.

  • Animals were located at this distance from Waterford 3, but the milk is not used for human consumption.

Plant: Waterford 3 I Year: 2020 I Page 25 of 50 Annual Radiological Environmental Operating Report 4.6 Interlaboratory Comparison Results Attachment 3 contains result summary for Interlaboratory Comparison program for Teledyne Brown Engineering to fulfill the requirements of section 5.7.2 of the ODCM.

5.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

1. Table 6, Radiological Environmental Monitoring Program Summary, summarizes data for the 2020 REMP.

Plant: Waterford 3 I Year: 2020 I Page 26 of 50 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Indicator(4) Control Number of Sample Type Type / Number Location Mean (F)(3)

LLD (2) Mean (F)(3) Locations Mean Non Routine (Units) of Analyses(1) [Highest [Range]

[Range] (F)(3) [Range] Results(5)

Annual Mean]

GB / 130 0.01 0.0167 (104 / 104) APP-1 0.0170 (26 / 26) 0.0169 (26 / 26) 0

[0.0100 - 0.0311] (119, 0.84 mi) [0.0108 - 0.0282] [0.0101 - 0.0305]

Air Particulate (pCi/m3) GS / 20 Cs-134 0.05 < LLD N/A N/A < LLD 0 Cs-137 0.06 < LLD N/A N/A < LLD 0 I-131 / 130 0.07 < LLD N/A N/A < LLD 0 Airborne Iodine (pCi/m3)

Inner Ring TLD Gamma / 63 (6) 11.4 (63 / 63) L-1 13.3 (4 / 4) N/A 0 (mR/Qtr) [8.5 - 14.8] (42, 1.06 mi.) [12.7 - 14.0]

Outer Ring TLD Gamma / 40 (6) 12.3 (40 / 40) P-6 13.8 (4 / 4) N/A 0 (mR/Qtr) [9.0 - 14.8] (107, 5.58 mi.) [12.8 - 14.5]

Special Interest Gamma / 16 (6) 10.6 (16 / 16) G-8 10.9 (4 / 4) N/A 0 TLD (mR/Qtr) [9.6 - 11.4] (305, 7.74 mi.) [9.8 - 11.4]

Control TLD Gamma / 4 (6) N/A N/A N/A 9.3 (4 / 4) 0 (mR/Qtr) [8.9 - 9.7]

Plant: Waterford 3 I Year: 2020 I Page 27 of 50 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Indicator(4) Control Number of Sample Type Type / Number Location Mean (F)(3)

LLD (2) Mean (F)(3) Locations Mean Non Routine (Units) of Analyses(1) [Highest [Range]

[Range] (F)(3) [Range] Results(5)

Annual Mean]

H-3 / 5 2000 < LLD N/A N/A N/A 0 GS / 13 Mn-54 15 < LLD N/A N/A N/A 0 Co-58 15 < LLD N/A N/A N/A 0 Fe-59 30 < LLD N/A N/A N/A 0 Co-60 15 < LLD N/A N/A N/A 0 Surface Water Zn-65 30 < LLD N/A N/A N/A 0 (pCi/L)

Nb-95 15 < LLD N/A N/A N/A 0 I-131 15 < LLD N/A N/A N/A 0 Zr-95 15 < LLD N/A N/A N/A 0 Cs-134 15 < LLD N/A N/A N/A 0 Cs-137 18 < LLD N/A N/A N/A 0 Ba-140 15 < LLD N/A N/A N/A 0 La-140 15 < LLD N/A N/A N/A 0

Plant: Waterford 3 I Year: 2020 I Page 28 of 50 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Indicator(4) Control Number of Sample Type Type / Number Location Mean (F)(3)

LLD (2) Mean (F)(3) Locations Mean Non Routine (Units) of Analyses(1) [Highest [Range]

[Range] (F)(3) [Range] Results(5)

Annual Mean]

GB / 15 4 3.8 (8/10) DW/SWF-2 4.0 (4/5) 4.9 (4/5) 0

[ 2.8 - 5.2] (302, 1.51 mi.) [2.8 - 5.2] [4.3 - 5.6]

I-131 / 40 1 < LLD N/A N/A < LLD 0 H-3 / 15 2000 < LLD N/A N/A < LLD 0 GS / 15 Mn-54 15 < LLD N/A N/A < LLD 0 Drinking/Surface Co-58 15 < LLD N/A N/A < LLD 0 Water (pCi/L)

Fe-59 30 < LLD N/A N/A < LLD 0 Co-60 15 < LLD N/A N/A < LLD 0 Zn-65 30 < LLD N/A N/A < LLD 0 Nb-95 15 < LLD N/A N/A < LLD 0 Zr-95 15 < LLD N/A N/A < LLD 0 Cs-134 15 < LLD N/A N/A < LLD 0 Cs-137 18 < LLD N/A N/A < LLD 0 Ba-140 15 < LLD N/A N/A < LLD 0 La-140 15 < LLD N/A N/A < LLD 0 GS / 3 I

Sediment (pCi/kg dry)

I Cs-134 Cs-137 D 150 180

< LLD

< LLD N/A N/A N/A N/A

< LLD

< LLD 0

0

Plant: Waterford 3 I Year: 2020 I Page 29 of 50 Annual Radiological Environmental Operating Report Table 6: Radiological Environmental Monitoring Program Summary Indicator Locations Indicator(4) Control Number of Sample Type Type / Number Location Mean (F)(3)

LLD (2) Mean (F)(3) Locations Mean Non Routine (Units) of Analyses(1) [Highest [Range]

[Range] (F)(3) [Range] Results(5)

Annual Mean]

GS / 12 Mn-54 130 < LLD N/A N/A < LLD 0 Co-58 130 < LLD N/A N/A < LLD 0 Fish Fe-59 260 < LLD N/A N/A < LLD 0 (pCi/kg wet) Co-60 130 < LLD N/A N/A < LLD 0 Zn-65 260 < LLD N/A N/A < LLD 0 Cs-134 130 < LLD N/A N/A < LLD 0 Cs-137 150 < LLD N/A N/A < LLD 0 GS / 12 Broad Leaf I-131 60 < LLD N/A N/A N/A 0 (pCi/kg wet) Cs-134 60 < LLD N/A N/A N/A 0 Cs-137 80 < LLD N/A N/A N/A 0 I-131 / 4 1 N/A N/A N/A < LLD 0 GS / 4 Milk Cs-134 15 N/A N/A N/A < LLD 0 (pCi/L)

Cs-137 18 N/A N/A N/A 0 Ba-140 15 N/A N/A N/A < LLD 0 La-140 15 N/A N/A N/A < LLD 0 LEGEND:

(1)

- GB = Gross beta; I-131 = Iodine-131; H-3 = Tritium; GS = Gamma scan.

(2)

- LLD = Required lower limit of detection based on Waterford 3 TRM.

(3)

- Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis (F).

(4)

- Locations are specified (1) by name and (2) degrees relative to reactor site.

(5)

- Non-routine results are those which exceed ten times the control station value. If no control station value is available, the result is considered non-routine if it exceeds ten times the preoperational value for the location.

(6)

- LLD is not defined in Waterford 3 TRM.

Plant: Waterford 3 I Year: 2020 I Page 30 of 50 Annual Radiological Environmental Operating Report Attachment 1 Page 1 of 1 Sample Deviations Table 7: Sample Deviations Table Sample Comment Sample Media Date Problem Evaluation / Actions No. Location Affected Milk samples from indicator station MKE-3 were unavailable for all four quarters Sample 1 Milk MKE-3 2020 of 2020 due to the cows not producing enough milk. Broad Leaf vegetation Unavailable sampling was performed in place of the milk indicator sampling.

TLD from station D-2 was unable to be analyzed due to sample being missing at 2 TLD D-2 07/08/20 Sample Missing time of collection.

The air particulate and charcoal sample collected from 11/02/20-11/16/20 had 11/02/20-3 AP/C APC-1 Low Volume low volumes due to power being temporarily secured during construction at the 11/16/20 sample location.

The air particulate and charcoal sample collected from 11/30/20-12/14/20 had 11/30/20-4 AP/C APQ-1 Low Volume low volumes due to the sample pump found not working. The sample pump was 12/14/20 replaced on the same day the pump was found not working.

Plant: Waterford 3 Year: 2020 Page 31 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 1 of 14 Monitoring Results Tables Table 8: Air Particulate Data Table Analysis: Gross Beta Units: pCi/m3 (1)

APF-1 APQ-1 APP-1 APC-1 APE-26 Start Date End Date (Indicator) (Indicator) (Indicator) (Indicator) (Control)

REQUIRED LLD 0.01 0.01 0.01 0.01 0.01 12/30/2019 01/13/2020 0.012 0.012 0.015 0.011 0.012 01/13/2020 01/27/2020 0.013 0.013 0.014 0.015 0.010 01/27/2020 02/10/2020 0.020 0.019 0.019 0.017 0.018 02/10/2020 02/24/2020 0.011 0.011 0.013 0.012 0.010 02/24/2020 03/09/2020 0.015 0.015 0.020 0.015 0.017 03/09/2020 03/23/2020 0.013 0.012 0.014 0.011 0.013 03/23/2020 04/06/2020 0.013 0.012 0.014 0.015 0.016 04/06/2020 04/20/2020 0.013 0.015 0.014 0.016 0.015 04/20/2020 05/04/2020 0.015 0.013 0.013 0.014 0.014 05/04/2020 05/18/2020 0.019 0.017 0.016 0.017 0.018 05/18/2020 06/01/2020 0.018 0.018 0.022 0.019 0.020 06/01/2020 06/15/2020 0.010 0.011 0.011 0.011 0.011 06/15/2020 06/29/2020 0.020 0.020 0.018 0.018 0.019 06/29/2020 07/13/2020 0.019 0.018 0.018 0.017 0.018 07/13/2020 07/27/2020 0.015 0.014 0.014 0.012 0.012 07/27/2020 08/10/2020 0.022 0.022 0.019 0.020 0.021 08/10/2020 08/23/2020 0.020 0.024 0.023 0.022 0.024 08/23/2020 09/07/2020 0.011 0.010 0.011 0.010 0.012 09/07/2020 09/21/2020 0.019 0.017 0.019 0.016 0.018 09/21/2020 10/05/2020 0.019 0.017 0.016 0.017 0.012 10/05/2020 10/19/2020 0.020 0.018 0.020 0.019 0.020 10/19/2020 11/02/2020 0.021 0.019 0.024 0.016 0.017 (3) 11/02/2020 11/16/2020 0.015 0.014 0.013 0.020 0.015 11/16/2020 11/30/2020 0.017 0.016 0.013 0.015 0.017 (4) 11/30/2020 12/14/2020 0.030 0.031 0.028 0.029 0.031 12/14/2020 12/28/2020 0.012 0.027 0.025 0.026 0.028 (1)

Station with highest annual mean.

(3)

See Attachment 1, Table 7, Samples Deviations Table, Comment 3 (4)

See Attachment 1, Table 7, Samples Deviations Table, Comment 4

Plant: Waterford 3 Year: 2020 Page 32 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 2 of 14 Monitoring Results Tables Table 9: Radioiodine Cartridge Data Table Analysis: I-131 Units: pCi/m3 APF-1 APQ-1 APP-1 APC-1 APE-26 Start Date End Date (Indicator) (Indicator) (Indicator) (Indicator) (Control)

REQUIRED LLD 0.07 0.07 0.07 0.07 0.07 12/30/2019 01/13/2020 < 0.018 < 0.019 < 0.008 < 0.017 < 0.017 01/13/2020 01/27/2020 < 0.014 < 0.014 < 0.007 < 0.013 < 0.013 01/27/2020 02/10/2020 < 0.012 < 0.013 < 0.013 < 0.006 < 0.012 02/10/2020 02/24/2020 < 0.012 < 0.012 < 0.006 < 0.011 < 0.011 02/24/2020 03/09/2020 < 0.018 < 0.018 < 0.019 < 0.007 < 0.017 03/09/2020 03/23/2020 < 0.018 < 0.019 < 0.008 < 0.017 < 0.018 03/23/2020 04/06/2020 < 0.020 < 0.021 < 0.009 < 0.019 < 0.021 04/06/2020 04/20/2020 < 0.022 < 0.023 < 0.010 < 0.021 < 0.022 04/20/2020 05/04/2020 < 0.017 < 0.017 < 0.015 < 0.016 < 0.017 05/04/2020 05/18/2020 < 0.017 < 0.017 < 0.007 < 0.016 < 0.017 05/18/2020 06/01/2020 < 0.016 < 0.017 < 0.014 < 0.015 < 0.016 06/01/2020 06/15/2020 < 0.018 < 0.019 < 0.008 < 0.017 < 0.018 06/15/2020 06/29/2020 < 0.023 < 0.024 < 0.010 < 0.022 < 0.023 06/29/2020 07/13/2020 < 0.018 < 0.019 < 0.008 < 0.018 < 0.019 07/13/2020 07/27/2020 < 0.023 < 0.024 < 0.010 < 0.021 < 0.024 07/27/2020 08/10/2020 < 0.016 < 0.016 < 0.009 < 0.015 < 0.016 08/10/2020 08/23/2020 < 0.025 < 0.026 < 0.011 < 0.024 < 0.026 08/23/2020 09/07/2020 < 0.019 < 0.020 < 0.008 < 0.018 < 0.020 09/07/2020 09/21/2020 < 0.019 < 0.020 < 0.009 < 0.018 < 0.020 09/21/2020 10/05/2020 < 0.018 < 0.019 < 0.008 < 0.017 < 0.018 10/05/2020 10/19/2020 < 0.014 < 0.014 < 0.013 < 0.013 < 0.014 10/19/2020 11/02/2020 < 0.016 < 0.016 < 0.014 < 0.014 < 0.016 (3) 11/02/2020 11/16/2020 < 0.019 < 0.020 < 0.021 < 0.012 < 0.019 11/16/2020 11/30/2020 < 0.022 < 0.023 < 0.010 < 0.021 < 0.022 (4) 11/30/2020 12/14/2020 < 0.016 < 0.025 < 0.017 < 0.012 < 0.016 12/14/2020 12/28/2020 < 0.012 < 0.015 < 0.016 < 0.014 < 0.015 (3)

See Attachment 1, Table 7, Samples Deviations Table, Comment 3 (4)

See Attachment 1, Table 7, Samples Deviations Table, Comment 4

Plant: Waterford 3 Year: 2020 Page 33 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 3 of 14 Monitoring Results Tables Table 10: Air Particulate Composite Data Table Analysis: Gamma Isotopic Units: pCi/m3 Location Collection Date Cs-134 Cs-137 REQUIRED LLD 0.05 0.06 APF-1 (Indicator) 02/24/2020 < 0.003 < 0.003 APQ-1 (Indicator) 02/24/2020 < 0.003 < 0.003 APP-1 (Indicator) 02/24/2020 < 0.002 < 0.002 APC-1 (Indicator) 02/24/2020 < 0.003 < 0.003 APE-26 (Control) 02/24/2020 < 0.003 < 0.002 APF-1 (Indicator) 05/18/2020 < 0.003 < 0.002 APQ-1 (Indicator) 05/18/2020 < 0.002 < 0.002 APP-1 (Indicator) 05/18/2020 < 0.003 < 0.003 APC-1 (Indicator) 05/18/2020 < 0.003 < 0.001 APE-26 (Control) 05/18/2020 < 0.005 < 0.003 APF-1 (Indicator) 08/10/2020 < 0.003 < 0.003 APQ-1 (Indicator) 08/10/2020 < 0.002 < 0.002 APP-1 (Indicator) 08/10/2020 < 0.002 < 0.002 APC-1 (Indicator) 08/10/2020 < 0.002 < 0.002 APE-26 (Control) 08/10/2020 < 0.003 < 0.002 APF-1 (Indicator) 11/02/2020 < 0.003 < 0.003 APQ-1 (Indicator) 11/02/2020 < 0.002 < 0.002 APP-1 (Indicator) 11/02/2020 < 0.003 < 0.002 APC-1 (Indicator) 11/02/2020 < 0.003 < 0.002 APE-26 (Control) 11/02/2020 < 0.003 < 0.002

Plant: Waterford 3 Year: 2020 Page 34 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 4 of 14 Monitoring Results Tables Table 11: Thermoluminescent Dosimeters - Inner Ring Analysis: Gamma Dose Units: mrem/Std. Qtr.

st nd rd th 1 Qtr 2 Qtr 3 Qtr 4 Qtr Annual Mean Station 2020 2020 2020 2020 2020 A-2 12.5 11.8 12.2 12.8 12.3 B-1 13.1 12.5 12.2 12.7 12.6 C-1 9.1 8.6 8.8 9.6 9.0 (2)

D-2 12.2 Lost 12.2 12.7 12.4 E-1 12.3 10.9 11.3 12.5 11.8 F-2 11.3 10.6 10.4 11.3 10.9 G-2 10.2 10.0 10.0 11.0 10.3 H-2 10.7 10.3 9.9 10.6 10.4 J-2 10.2 10.9 9.6 10.6 10.3 K-1 11.3 11.5 10.5 11.4 11.2 L-1 (1) 13.7 14.0 12.8 12.7 13.3 M-1 10.2 10.1 9.6 10.5 10.1 N-1 10.3 10.4 10.2 10.5 10.4 P-1 10.8 10.7 9.8 10.8 10.5 Q-1 12.1 12.5 11.7 12.8 12.3 R-1 9.3 9.0 8.5 9.6 9.1 (1)

Inner ring station with highest annual mean.

(2)

See Attachment 1, Table 7, Samples Deviations Table, Comment 2 Table 12: Thermoluminescent Dosimeters - Outer Ring Analysis: Gamma Dose Units: mrem/Std. Qtr.

st nd rd 1 Qtr 2 Qtr 3 Qtr 4th Qtr Annual Mean Station 2020 2020 2020 2020 2020 A-5 13.4 12.1 12.3 12.8 12.7 B-4 14.2 12.9 13.1 13.8 13.5 D-5 12.2 10.9 11.2 11.6 11.5 E-5 12.8 13.3 11.7 12.8 12.7 F-4 13.7 13.0 13.2 14.8 13.7 G-4 11.0 10.6 10.1 11.1 10.7 H-8 13.0 12.8 12.7 13.1 12.9 (1)

P-6 14.0 13.7 12.8 14.5 13.8 Q-5 11.7 12.6 11.7 12.4 12.1 R-6 9.9 9.9 9.0 9.8 9.7 (1)

Outer ring station with highest annual mean.

Plant: Waterford 3 Year: 2020 Page 35 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 5 of 14 Monitoring Results Tables Table 13: Thermoluminescent Dosimeters - Special Interest Areas Analysis: Gamma Dose Units: mrem/Std. Qtr.

st 1 Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean Station 2020 2020 2020 2020 2020 E-15 10.5 9.7 9.6 10.4 10.1 F-9 11.2 10.0 10.1 11.2 10.6 G-8(1) 9.8 11.4 10.9 11.3 10.9 J-15 11.2 11.1 10.1 10.6 10.8 (1)

Special interest station with highest annual mean.

Table 14: Thermoluminescent Dosimeters - Control Analysis: Gamma Dose Units: mrem/Std. Qtr.

1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean Station 2020 2020 2020 2020 2020 E-26 9.6 8.9 9.1 9.7 9.3

Plant: Waterford 3 Year: 2020 Page 36 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 6 of 14 Monitoring Results Tables Table 15: Surface Water - Gamma Analysis: Gamma Isotopic Units: pCi/L Location Start Date End Date Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 I-131 Zr-95 Cs-134 Cs-137 Ba-140 La-140 REQUIRED LLD 15 15 30 15 30 15 15 15 15 18 15 15 SWK-1 12/23/2019 01/20/2020 < 1.44 < 1.55 < 3.28 < 1.86 < 3.18 < 1.59 < 2.26 < 2.92 < 1.68 < 1.68 < 6.95 < 2.60 (Indicator)

SWK-1 01/20/2020 02/17/2020 < 1.78 < 1.91 < 3.63 < 2.03 < 3.34 < 1.74 < 2.51 < 2.95 < 1.99 < 1.83 < 7.35 < 2.52 (Indicator)

SWK-1 02/17/2020 03/16/2020 < 3.29 < 2.43 < 6.42 < 3.15 < 5.84 < 3.15 < 3.55 < 5.32 < 3.75 < 3.53 < 11.8 < 4.34 (Indicator)

SWK-1 03/16/2020 04/14/2020 < 1.98 < 1.92 < 3.88 < 2.09 < 3.77 < 1.96 < 2.25 < 3.46 < 2.11 < 2.11 < 7.44 < 2.43 (Indicator)

SWK-1 04/14/2020 05/12/2020 < 1.88 < 1.84 < 4.05 < 1.92 < 4.10 < 2.02 < 2.27 < 3.60 < 2.15 < 2.18 < 7.34 < 2.27 (Indicator)

SWK-1 05/12/2020 06/08/2020 < 2.14 < 2.00 < 4.31 < 2.06 < 4.21 < 2.01 < 2.72 < 3.61 < 2.42 < 2.20 < 8.32 < 2.92 (Indicator)

SWK-1 06/08/2020 07/07/2020 < 1.80 < 1.74 < 3.57 < 2.02 < 3.64 < 1.88 < 2.36 < 3.01 < 1.98 < 1.95 < 7.27 < 2.51 (Indicator)

SWK-1 07/07/2020 08/04/2020 < 1.86 < 1.86 < 3.69 < 1.96 < 3.65 < 1.87 < 2.51 < 3.08 < 2.17 < 2.00 < 7.54 < 2.51 (Indicator)

SWK-1 08/04/2020 09/01/2020 < 3.26 < 3.29 < 7.17 < 3.76 < 6.27 < 3.22 < 4.23 < 5.93 < 4.12 < 3.87 < 14.3 < 5.79 (Indicator)

SWK-1 09/01/2020 09/29/2020 < 3.16 < 3.28 < 7.23 < 3.55 < 6.50 < 3.59 < 4.24 < 5.56 < 3.71 < 3.30 < 13.3 < 4.56 (Indicator)

SWK-1 09/29/2020 10/27/2020 < 2.21 < 2.02 < 4.45 < 2.17 < 4.21 < 2.29 < 3.76 < 4.05 < 2.28 < 2.34 < 11.0 < 3.43 (Indicator)

SWK-1 10/27/2020 11/24/2020 < 3.48 < 3.12 < 7.00 < 3.20 < 6.57 < 3.59 < 5.06 < 5.69 < 3.54 < 3.83 < 14.8 < 5.00 (Indicator)

SWK-1 11/24/2020 12/22/2020 < 1.85 < 2.15 < 4.05 < 2.44 < 4.22 < 2.00 < 3.53 < 3.61 < 2.11 < 2.08 < 9.87 < 3.10 (Indicator)

Plant: Waterford 3 Year: 2020 Page 37 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 7 of 14 Monitoring Results Tables Table 16: Surface Water - Tritium Analysis: H-3 Units: pCi/L Location Start Date End Date H-3 REQUIRED LLD 3000 SWK-1 (Indicator) 10/29/2019 01/20/2020 < 538 SWK-1 (Indicator) 01/20/2020 04/14/2020 < 495 SWK-1 (Indicator) 04/14/2020 07/07/2020 < 518 SWK-1 (Indicator) 07/07/2020 09/29/2020 < 544 SWK-1 (Indicator) 09/29/2020 12/22/2020 < 560

Plant: Waterford 3 Year: 2020 Page 38 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 8 of 14 Monitoring Results Tables Table 17: Drinking/Surface Water - Gamma and Gross Beta Analysis: Gamma Isotopic, Gross Beta Units: pCi/L Collection Gross Location Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 Date Beta REQUIRED LLD 4 15 15 30 15 30 15 15 15 18 15 15 DWF/SWF-2(1) 01/20/2020 5.23 < 1.71 < 1.75 < 3.81 < 1.79 < 3.68 < 1.78 < 3.09 < 1.87 < 1.76 < 7.49 < 2.42 (Indicator)

DWE/SWE-5 01/20/2020 4.27 < 1.67 < 1.60 < 3.39 < 1.61 < 3.07 < 1.77 < 2.91 < 1.86 < 1.80 < 7.22 < 2.30 (Indicator)

DWP/SWP-7 01/20/2020 4.65 < 2.69 < 2.57 < 5.29 < 2.93 < 5.55 < 2.65 < 4.52 < 2.87 < 2.85 < 11.8 < 3.53 (Control)

DWF/SWF-2(1) 04/14/2020 < 2.33 < 1.52 < 1.42 < 3.10 < 1.63 < 3.14 < 1.56 < 2.63 < 1.80 < 1.52 < 7.62 < 2.30 (Indicator)

DWE/SWE-5 04/14/2020 3.16 < 1.56 < 1.58 < 3.66 < 1.64 < 3.49 < 1.70 < 2.89 < 1.73 < 1.78 < 7.85 < 2.65 (Indicator)

DWP/SWP-7 04/14/2020 < 1.96 < 1.64 < 1.70 < 3.55 < 1.75 < 3.47 < 1.75 < 3.11 < 1.92 < 1.79 < 7.62 < 2.52 (Control)

DWF/SWF-2(1) 07/07/2020 2.82 < 1.76 < 1.86 < 3.98 < 1.84 < 3.72 < 1.88 < 3.32 < 2.04 < 1.85 < 8.66 < 2.92 (Indicator)

DWE/SWE-5 07/07/2020 < 2.27 < 1.82 < 1.82 < 3.79 < 1.93 < 3.69 < 1.91 < 3.11 < 2.05 < 1.94 < 8.82 < 3.13 (Indicator)

DWP/SWP-7 07/07/2020 4.33 < 1.92 < 1.95 < 3.85 < 2.05 < 3.96 < 2.04 < 3.57 < 2.06 < 2.10 < 10.0 < 3.00 (Control)

DWF/SWF-2(1) 09/29/2020 3.45 < 2.24 < 2.25 < 4.75 < 2.41 < 4.37 < 2.47 < 4.06 < 2.57 < 2.48 < 11.1 < 4.16 (Indicator)

DWE/SWE-5 09/29/2020 3.90 < 2.17 < 2.44 < 4.97 < 2.42 < 4.7 < 2.35 < 3.82 < 2.64 < 2.48 < 11.6 < 2.97 (Indicator)

DWP/SWP-7 09/29/2020 5.63 < 2.18 < 2.18 < 4.65 < 2.08 < 4.01 < 2.28 < 3.76 < 2.2 < 2.31 < 9.98 < 3.12 (Control)

DWF/SWF-2(1) 12/22/2020 4.46 < 1.93 < 1.93 < 4.09 < 2.3 < 4.19 < 2.26 < 3.45 < 2.29 < 2.07 < 9.76 < 3.80 (Indicator)

DWE/SWE-5 12/22/2020 3.32 < 1.94 < 1.92 < 3.79 < 1.9 < 3.84 < 2.02 < 3.43 < 1.96 < 1.89 < 9.96 < 3.03 (Indicator)

DWP/SWP-7 12/22/2020 4.84 < 1.99 < 2.00 < 4.31 < 2.24 < 4.11 < 2.13 < 3.51 < 2.15 < 2.00 < 10.3 < 3.28 (Control)

(1)

Station with highest annual Gr-B mean.

Plant: Waterford 3 Year: 2020 Page 39 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 9 of 14 Monitoring Results Tables Table 18: Drinking/Surface Water- Iodine-131 Analysis: Iodine-131 Units: pCi/L Location Start Date End Date I-131 REQUIRED LLD 1.0 DWF/SWF-2 (Indicator) 12/23/2019 01/20/2020 < 0.888 DWE/SWE-5 (Indicator) 12/23/2019 01/20/2020 < 0.838 DWE/SWE-5 (Indicator) Dup. 12/23/2019 01/20/2020 < 0.829 DWP/SWP-7 (Control) 12/23/2019 01/20/2020 < 0.763 DWF/SWF-2 (Indicator) 01/20/2020 02/17/2020 < 0.683 DWE/SWE-5 (Indicator) 01/20/2020 02/17/2020 < 0.779 DWP/SWP-7 (Control) 01/20/2020 02/17/2020 < 0.762 DWF/SWF-2 (Indicator) 02/17/2020 03/16/2020 < 0.708 DWE/SWE-5 (Indicator) 02/17/2020 03/16/2020 < 0.838 DWP/SWP-7 (Control) 02/17/2020 03/16/2020 < 0.693 DWF/SWF-2 (Indicator) 03/16/2020 04/14/2020 < 0.813 DWE/SWE-5 (Indicator) 03/16/2020 04/14/2020 < 0.684 DWP/SWP-7 (Control) 03/16/2020 04/14/2020 < 0.514 DWF/SWF-2 (Indicator) 04/14/2020 05/12/2020 < 0.846 DWE/SWE-5 (Indicator) 04/14/2020 05/12/2020 < 0.696 DWP/SWP-7 (Control) 04/14/2020 05/12/2020 < 0.530 DWF/SWF-2 (Indicator) 05/12/2020 06/08/2020 < 0.520 DWE/SWE-5 (Indicator) 05/12/2020 06/08/2020 < 0.709 DWP/SWP-7 (Control) 05/12/2020 06/08/2020 < 0.693 DWF/SWF-2 (Indicator) 06/08/2020 07/07/2020 < 0.896 DWE/SWE-5 (Indicator) 06/08/2020 07/07/2020 < 0.793 DWP/SWP-7 (Control) 06/08/2020 07/07/2020 < 0.854 DWF/SWF-2 (Indicator) 07/07/2020 08/04/2020 < 0.775 DWE/SWE-5 (Indicator) 07/07/2020 08/04/2020 < 0.667 DWP/SWP-7 (Control) 07/07/2020 08/04/2020 < 0.586 DWF/SWF-2 (Indicator) 08/04/2020 09/01/2020 < 0.880 DWE/SWE-5 (Indicator) 08/04/2020 09/01/2020 < 0.787 DWP/SWP-7 (Control) 08/04/2020 09/01/2020 < 0.751 DWF/SWF-2 (Indicator) 09/01/2020 09/29/2020 < 0.649 DWE/SWE-5 (Indicator) 09/01/2020 09/29/2020 < 0.589 DWP/SWP-7 (Control) 09/01/2020 09/29/2020 < 0.707 DWF/SWF-2 (Indicator) 09/29/2020 10/27/2020 < 0.797 DWE/SWE-5 (Indicator) 09/29/2020 10/27/2020 < 0.768 DWP/SWP-7 (Control) 09/29/2020 10/27/2020 < 0.702 DWF/SWF-2 (Indicator) 10/27/2020 11/24/2020 < 0.791 DWE/SWE-5 (Indicator) 10/27/2020 11/24/2020 < 0.891 DWP/SWP-7 (Control) 10/27/2020 11/24/2020 < 0.773 DWF/SWF-2 (Indicator) 11/24/2020 12/22/2020 < 0.708 DWE/SWE-5 (Indicator) 11/24/2020 12/22/2020 < 0.529 DWP/SWP-7 (Control) 11/24/2020 12/22/2020 < 0.589

Plant: Waterford 3 Year: 2020 Page 40 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 10 of 14 Monitoring Results Tables Table 19: Drinking/Surface Water - Tritium Analysis: H-3 Units: pCi/L Location Start Date End Date H-3 REQUIRED LLD 2000 DWF/SWF-2 (Indicator) 10/29/2019 01/20/2020 < 541 DWE/SWE-5 (Indicator) 10/29/2019 01/20/2020 < 535 DWP/SWP-7 (Control) 10/29/2019 01/20/2020 < 537 DWF/SWF-2 (Indicator) 01/20/2020 04/14/2020 < 498 DWE/SWE-5 (Indicator) 01/20/2020 04/14/2020 < 502 DWP/SWP-7 (Control) 01/20/2020 04/14/2020 < 511 DWF/SWF-2 (Indicator) 04/14/2020 07/07/2020 < 476 DWE/SWE-5 (Indicator) 04/14/2020 07/07/2020 < 478 DWP/SWP-7 (Control) 04/14/2020 07/07/2020 < 477 DWF/SWF-2 (Indicator) 07/07/2020 09/29/2020 < 548 DWE/SWE-5 (Indicator) 07/07/2020 09/29/2020 < 538 DWP/SWP-7 (Control) 07/07/2020 09/29/2020 < 552 DWF/SWF-2 (Indicator) 09/29/2020 12/22/2020 < 548 DWE/SWE-5 (Indicator) 09/29/2020 12/22/2020 < 547 DWP/SWP-7 (Control) 09/29/2020 12/22/2020 < 555

Plant: Waterford 3 Year: 2020 Page 41 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 11 of 14 Monitoring Results Tables Table 20: Sediment - Gamma Analysis: Gamma Isotopic Units: pCi/kg (dry)

Location Collection Date Cs-134 Cs-137 REQUIRED LLD 150 180 SHWK-1 (Indicator) 09/08/2020 < 84.20 < 89.40 SHWE-3 (Indicator) 09/08/2020 < 73.90 < 65.10 SHWQ-6 (Control) 09/08/2020 < 76.00 < 72.00

Plant: Waterford 3 Year: 2020 Page 42 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 12 of 14 Monitoring Results Tables Table 21: Fish - Gamma Analysis: Gamma Isotopic Units: pCi/kg (wet)

Collection Location Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 Date REQUIRED LLD 130 130 260 130 260 130 150 FH-1 11/21/2020 < 66.25 < 68.25 < 172.2 < 56.15 < 114.2 < 79.09 < 68.38 (Control)

FH-2 11/21/2020 < 56.76 < 50.76 < 129.5 < 50.59 < 115.8 < 63.06 < 55.99 (Indicator)

FH-3 11/10/2020 < 81.95 < 83.40 < 248.0 < 54.81 < 158.3 < 66.52 < 86.44 (Indicator)

FH-1 11/21/2020 < 70.46 < 80.21 < 138.5 < 64.70 < 219.4 < 75.07 < 72.54 (Control)

FH-2 11/21/2020 < 50.71 < 62.66 < 129.7 < 57.18 < 126.0 < 72.05 < 68.87 (Indicator)

FH-3 11/10/2020 < 73.04 < 70.97 < 151.1 < 53.30 < 106.5 < 71.15 < 57.14 (Indicator)

FH-1 11/21/2020 < 64.55 < 59.37 < 116.3 < 36.01 < 108.0 < 68.51 < 61.52 (Control)

FH-2 11/21/2020 < 68.57 < 65.40 < 149.8 < 96.31 < 152.4 < 80.72 < 69.71 (Indicator)

FH-3 11/10/2020 < 52.12 < 74.37 < 135.9 < 65.34 < 115.5 < 57.77 < 57.53 (Indicator)

FH-1 11/21/2020 < 63.42 < 59.51 < 140.0 < 63.99 < 120.2 < 49.89 < 51.24 (Control)

FH-2 11/21/2020 < 79.33 < 71.95 < 180.9 < 75.25 < 165.1 < 102.6 < 72.07 (Indicator)

FH-3 11/10/2020 < 39.76 < 67.00 < 180.5 < 44.62 < 120.3 < 69.67 < 54.74 (Indicator)

Plant: Waterford 3 Year: 2020 Page 43 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 13 of 14 Monitoring Results Tables Table 22: Broad Leaf Vegatation - Gamma Analysis: Gamma Isotopic Units: pCi/kg (wet)

Location Collection Date I-131 Cs-134 Cs-137 REQUIRED LLD 60 60 80 BLQ-1 (Indicator) 03/10/2020 < 21.61 < 19.18 < 16.06 BLB-1 (Indicator) 03/10/2020 < 29.18 < 27.18 < 25.96 BLE-20 (Control) 03/10/2020 < 20.81 < 17.46 < 16.40 BLQ-1 (Indicator) 06/09/2020 < 41.32 < 29.01 < 32.23 BLB-1 (Indicator) 06/09/2020 < 23.90 < 32.59 < 32.61 BLE-20 (Control) 06/09/2020 < 38.94 < 40.27 < 35.99 BLQ-1 (Indicator) 09/08/2020 < 30.05 < 27.47 < 29.42 BLB-1 (Indicator) 09/08/2020 < 24.14 < 22.98 < 21.80 BLE-20 (Control) 09/08/2020 < 39.95 < 36.56 < 38.99 BLQ-1 (Indicator) 12/08/2020 < 47.88 < 37.81 < 45.03 BLB-1 (Indicator) 12/08/2020 < 43.52 < 47.03 < 51.79 BLE-20 (Control) 12/08/2020 < 38.31 < 45.81 < 36.43

Plant: Waterford 3 Year: 2020 Page 44 of 50 Annual Radiological Environmental Operating Report Attachment 2 Page 14 of 14 Monitoring Results Tables Table 23: Milk - Gamma and Iodine-131 Analysis: Gamma Isotopic, Iodine-131 Units: pCi/L Collection Location I-131 Cs-134 Cs-137 Ba-140 La-140 Date REQUIRED LLD 1 15 18 15 15 MKE-3 03/10/2020 (1) (1) (1) (1) (1)

(Indicator)

MKA-31 03/10/2020 < 0.669 < 3.76 < 4.01 < 13.3 < 3.63 (Control)

MKE-3 06/09/2020 (1) (1) (1) (1) (1)

(Indicator)

MKA-31 06/09/2020 < 0.604 < 3.25 < 3.56 < 11.2 < 2.95 (Control)

MKE-3 09/08/2020 (1) (1) (1) (1) (1)

(Indicator)

MKA-31 09/08/2020 < 0.759 < 4.06 < 4.41 < 15.0 < 3.72 (Control)

MKE-3 12/08/2020 (1) (1) (1) (1) (1)

(Indicator)

MKA-31 12/08/2020 < 0.851 < 3.98 < 3.99 < 14.6 < 3.71 (Control)

(1)

See Attachment 1, Table 7, Samples Deviations Table, Comment 1

Plant: Waterford 3 I Year: 2020 I Page 45 of 50 Annual Radiological Environmental Operating Report Attachment 3 Page 1 of 6 Interlaboratory Comparison Program Results 1.0 Summary For the Teledyne Brown Engineering (TBE) laboratory, 126 out of 133 analyses performed met the specified acceptance criteria. Seven analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program.

Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

1. The MAPEP February 2020 AP U-233/234 and U-238 results were evaluated as Not Acceptable. The reported value for U-233/234 was 0.0416 +/- 0.0102 Bq/sample and the known result was 0.075 Bq/sample (acceptance range 0.053 - 0.098). The reported value for U-238 was 0.0388 +/- 0.00991 Bq/sample and the known result was 0.078 Bq/sample (acceptance range 0.055 - 0.101). This sample was run as the workgroup duplicate and had RPDs of 10.4% (U-234) and 11.7% (U-238). After the known results were obtained, the sample was relogged. The filter was completely digested with tracer added originally; the R1 results were almost identical. It was concluded that the recorded tracer amount was actually double, causing the results to be skewed. Lab worksheets have been modified to verify actual tracer amount vs. LIMS data. TBE changed vendors for this cross-check to ERA MRAD during the 2nd half of 2020. Results were acceptable at 97.8% for U-234 and 106% for U-238. (NCR 20-13)
2. The Analytics September 2020 milk Sr-89 result was evaluated as Not Acceptable. The reported value was 62.8 pCi/L and the known result was 95.4 (66%). All QC data was reviewed and there were no anomalies. This was the first failure for milk Sr-89 since 2013 and there have only been 3 upper/lower boundary warnings since that time. It is believed that there may have been some Sr-89 loss during sample prep. The December 2020 result was at 92%

of the known. (NCR 20-19)

3. The ERA October 2020 water I-131 result was evaluated as Not Acceptable.

The reported value was 22.9 pCi/L and the known result was 28.2 (acceptance range 23.5 - 33.1). The reported result was 81% of the known, which passes TBE QC criteria. This was the first failure for water I-131. (NCR 20-17)

4. The ERA October 2020 water Gross Alpha and Gross Beta results were evaluated as Not Acceptable. The reported/acceptable values and ranges are as follows:

Reported Known Range Gross Alpha 40.0 26.6 13.3 - 34.7 Gross Beta 47.5 69.1 48.0 - 76.0

Plant: Waterford 3 I Year: 2020 I Page 46 of 50 Annual Radiological Environmental Operating Report Page 2 of 6 Interlaboratory Comparison Program Results All QC data was reviewed with no anomalies and a cause for failure could not be determined. This was the first failure for water Gross Beta. A Quick Response follow-up cross-check was analyzed as soon as possible with acceptable results at 96.8% for Gross Alpha and 102% for Gross Beta. (NCR 20-18)

5. The MAPEP August 2020 soil Ni-63 result was evaluated as Not Acceptable.

The reported value was 438 +/- 21.1 Bq/kg and the known result was 980 Bq/kg (acceptance range 686 - 1274). It is believed that some Ni-63 loss occurred during the sample prep step. (NCR 20-20)

The Inter-Laboratory Comparison Program provides evidence of in control counting systems and methods, and that the laboratories are producing accurate and reliable data.

Plant: Waterford 3 Year: 2020 Page 47 of 50 Annual Radiological Environmental Operating Report Attachment 3 Page 3 of 6 Table 24: Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units TBE Value Evaluation (b)

Number Value (a) Known Result September 2020 E13247 Milk Sr-89 pCi/L 62.8 95.4 0.66 N(1)

Sr-90 pCi/L 12.0 12.8 0.94 A E13248 Milk Ce-141 pCi/L 156 150 1.04 A Co-58 pCi/L 172 180 0.96 A Co-60 pCi/L 369 379 0.97 A Cr-51 pCi/L 372 372 1.00 A Cs-134 pCi/L 171 200 0.85 A Cs-137 pCi/L 241 250 0.96 A Fe-59 pCi/L 217 200 1.08 A I-131 pCi/L 84.6 95.0 0.89 A Mn-54 pCi/L 175 180 0.97 A Zn-65 pCi/L 252 270 0.93 A E13249 Charcoal I-131 pCi 70.2 75.8 0.93 A E13250 AP Ce-141 pCi 101 101 1.00 A Co-58 pCi 111 120 0.92 A Co-60 pCi 249 254 0.98 A Cr-51 pCi 287 249 1.15 A Cs-134 pCi 114 134 0.85 A Cs-137 pCi 159 168 0.95 A Fe-59 pCi 127 134 0.95 A Mn-54 pCi 114 121 0.94 A Zn-65 pCi 168 181 0.93 A E13251 Soil Ce-141 pCi/g 0.241 0.191 1.26 W Co-58 pCi/g 0.211 0.228 0.93 A Co-60 pCi/g 0.466 0.481 0.97 A Cr-51 pCi/g 0.450 0.472 0.95 A Cs-134 pCi/g 0.273 0.254 1.07 A Cs-137 pCi/g 0.370 0.390 0.95 A Fe-59 pCi/g 0.233 0.254 0.92 A Mn-54 pCi/g 0.217 0.229 0.95 A Zn-65 pCi/g 0.368 0.343 1.07 A E13252 AP Sr-89 pCi 79.9 100.0 0.80 A Sr-90 pCi 12.1 13.4 0.90 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) See NCR 20-19 (Page 1 of 4)

Plant: Waterford 3 Year: 2020 Page 48 of 50 Annual Radiological Environmental Operating Report Attachment 3 Page 4 of 6 Table 24: Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units TBE Value Evaluation (b)

Number Value (a) Known Result December 2020 E13254 Milk Sr-89 pCi/L 82.2 89.7 0.92 A Sr-90 pCi/L 12.4 13.0 0.96 A E13255 Milk Ce-141 pCi/L 91.1 100 0.91 A Co-58 pCi/L 77.5 84.3 0.92 A Co-60 pCi/L 147 152 0.97 A Cr-51 pCi/L 259 253 1.02 A Cs-134 pCi/L 97.1 108 0.90 A Cs-137 pCi/L 117 127 0.92 A Fe-59 pCi/L 114 112 1.02 A I-131 pCi/L 84.3 91.9 0.92 A Mn-54 pCi/L 137 143 0.96 A Zn-65 pCi/L 175 190 0.92 A E13256 Charcoal I-131 pCi 70.2 78.2 0.90 A E13257A AP Ce-141 pCi 67.4 74.6 0.90 A Co-58 pCi 57.9 62.9 0.92 A Co-60 pCi 108 113 0.95 A Cr-51 pCi 162 189 0.86 A Cs-134 pCi 68.1 80.4 0.85 A Cs-137 pCi 82.4 95.0 0.87 A Fe-59 pCi 80.5 83.7 0.96 A Mn-54 pCi 102 107 0.95 A Zn-65 pCi 115 142 0.81 A E13258 Soil Ce-141 pCi/g 0.167 0.170 0.98 A Co-58 pCi/g 0.125 0.143 0.87 A Co-60 pCi/g 0.245 0.257 0.95 A Cr-51 pCi/g 0.393 0.429 0.92 A Cs-134 pCi/g 0.147 0.183 0.80 A Cs-137 pCi/g 0.260 0.288 0.90 A Fe-59 pCi/g 0.199 0.190 1.05 A Mn-54 pCi/g 0.229 0.243 0.94 A Zn-65 pCi/g 0.320 0.322 0.99 A E13259 AP Sr-89 pCi 85.0 78.6 1.08 A Sr-90 pCi 13.1 11.4 1.15 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (Page 2 of 4)

Plant: Waterford 3 Year: 2020 Page 49 of 50 Annual Radiological Environmental Operating Report Attachment 3 Page 5 of 6 Table 25: DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services Identification TBE Known Acceptance Month/Year Matrix Nuclide Units Evaluation (b)

Number Value Value (a) Range February 2020 20-GrF42 AP Gross Alpha Bq/sample 0.676 1.24 0.37 - 2.11 A Gross Beta Bq/sample 2.03 2.00 1.00 - 3.00 A 20-MaS42 Soil Ni-63 Bq/kg 0.01 (1) A Sr-90 Bq/kg 348 340 238 - 442 A 20-MaW42 Water Ni-63 Bq/L 11.6 11.1 7.8 - 14.4 A Pu-238 Bq/L 0.926 0.94 0.66 - 1.22 A Pu-239/240 Bq/L 0.712 0.737 0.516 - 0.958 A 20-RdF42 AP U-234/233 Bq/sample 0.0416 0.075 0.053 - 0.098 N(3)

U-238 Bq/sample 0.0388 0.078 0.055 - 0.101 N(3) 20-RdV42 Vegetation Cs-134 Bq/sample 3.23 3.82 2.67 - 4.97 A Cs-137 Bq/sample 2.64 2.77 1.94 - 3.60 A Co-57 Bq/sample 0.0281 (1) A Co-60 Bq/sample 2.62 2.79 1.95 - 3.63 A Mn-54 Bq/sample 4.3 4.58 3.21 - 5.95 A Sr-90 Bq/sample 0.396 0.492 0.344 - 0.640 A Zn-65 Bq/sample 3.93 3.79 2.65 - 4.93 A August 2020 20-GrF43 AP Gross Alpha Bq/sample 0.267 0.528 0.158 - 0.989 A Gross Beta Bq/sample 0.939 0.915 0.458 - 1.373 A 20-MaS43 Soil Ni-63 Bq/kg 438 980 686 - 1274 N(4)

Tc-99 Bq/kg 1.11 (1) A 20-MaW43 Water Ni-63 Bq/L 0.175 (1) A Tc-99 Bq/L 8.8 9.4 6.6 - 12.2 A 20-RdV43 Vegetation Cs-134 Bq/sample 3.635 4.94 3.46 - 6.42 W Cs-137 Bq/sample 0.0341 (1) A Co-57 Bq/sample 5.855 6.67 4.67 - 8.67 W Co-60 Bq/sample 3.122 4.13 2.89 - 5.37 W Mn-54 Bq/sample 4.524 5.84 4.09 - 7.59 A Sr-90 Bq/sample 1.01 1.39 0.97 - 1.81 W Zn-65 Bq/sample 4.706 6.38 4.47 - 8.29 W (a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOE/MAPEP evaluation:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) False positive test (2) Sensitivity evaluation (3) See NCR 20-13 (4) See NCR 20-20 (Page 3 of 4)

Plant: Waterford 3 Year: 2020 Page 50 of 50 Annual Radiological Environmental Operating Report Attachment 3 Page 6 of 6 Table 26: ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services Identification Known Acceptance Month/Year Matrix Nuclide Units TBE Value Evaluation (b)

Number Value (a) Limits March 2020 MRAD-32 Water Am-241 pCi/L 52.5 45.3 31.1 - 57.9 A Fe-55 pCi/L 155 152 89.3 - 221 A Pu-238 pCi/L 34.0 36.4 21.9 - 47.2 A Pu-239 pCi/L 30.9 33.6 20.8 - 41.4 A April 2020 RAD-121 Water Ba-133 pCi/L 41.8 41.8 34.0- 46.7 A Cs-134 pCi/L 42.9 46.3 37.1 - 50.9 A Cs-137 pCi/L 226 234 211 - 259 A Co-60 pCi/L 52.4 50.3 45.3 - 57.9 A Zn-65 pCi/L 83.3 86.8 78.1 - 104 A GR-A pCi/L 20.1 23.6 11.9 - 31.6 A GR-B pCi/L 45.6 60.5 41.7 - 67.2 A U-Nat pCi/L 18.45 18.6 14.9 - 20.9 A H-3 pCi/L 14200 14100 12300 - 15500 A Sr-89 pCi/L 58.0 60.1 48.3 - 67.9 A Sr-90 pCi/L 34.1 44.7 33.0 - 51.2 A I-131 pCi/L 27.4 28.9 24.1 - 33.8 A September 2020 MRAD-33 Soil Sr-90 pCi/Kg 4360 4980 1550 - 7760 A AP Fe-55 pCi/Filter 189 407 149 - 649 A U-234 pCi/Filter 17.9 18.3 13.6 - 21.4 A U-238 pCi/Filter 19.1 18.1 13.7 - 21.6 A Water Am-241 pCi/L 160 176 121 - 225 A Fe-55 pCi/L 299 298 175 - 433 A Pu-238 pCi/L 200 191 115 - 247 A Pu-239 pCi/L 105 100 61.9 - 123 A October 2020 RAD-123 Water Ba-133 pCi/L 37.1 37.0 29.8 - 41.6 A Cs-134 pCi/L 50.6 52.7 42.5 - 58.0 A Cs-137 pCi/L 131 131 118 - 146 A Co-60 pCi/L 62.9 60.5 54.4 - 69.1 A Zn-65 pCi/L 167 162 146 - 191 A GR-A pCi/L 40.0 26.2 13.3 - 34.7 N(1)

GR-B pCi/L 47.5 69.1 48.0 - 76.0 N(1)

U-Nat pCi/L 17.2 20.3 16.3 - 22.7 A H-3 pCi/L 23800 23200 20,300 - 25,500 A Sr-89 pCi/L 41.1 43.3 33.4 - 50.5 A Sr-90 pCi/L 28.5 30.2 22.0 - 35.0 A I-131 pCi/L 22.9 28.2 23.5 - 33.1 N(2)

November 2020 QR111920K Water GR-A pCi/L 50.7 52.4 27.3 - 65.6 A GR-B pCi/L 24.9 24.3 15.0 - 32.3 A (a) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(b) ERA evaluation:

A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 20-18 (2) See NCR 20-17 (Page 4 of 4)

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